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Issue 12, 2019

Growth of CdS nanotubes and their strong optical microcavity effects

Author affiliations

Abstract

Nanotubes are often formed by the folding of one-layer or multilayer compounds under microscopic catalytic growth conditions. Here, CdS nanotubes with tunable wall sizes and optical microcavities were prepared via a simple thermal evaporation co-deposition technique with Sn metal nanowire templating and ejection. Compared to core–shell Sn/CdS nanowires, which have poor microcavity quality, the hollow/CdS nanotubes have a higher quality factor (Q) that can reach approximately 400 in the spectral range of 550–800 nm when excited by a continuous-wave 405 nm laser. This high Q factor leads to low-threshold lasing and line-width narrowing due to the mode selection, which are important in many fields, including lasers, sensors, communications, and optical storage. A theoretical mode analysis of the hollow/CdS nanotubes with different thicknesses addressed their microcavity mode confinement and enhancements. This technique provides a new way to prepare semiconductor nanotubes for new photonic devices and photoelectric applications.

Graphical abstract: Growth of CdS nanotubes and their strong optical microcavity effects

Supplementary files

Article information


Submitted
21 Dec 2018
Accepted
18 Feb 2019
First published
22 Feb 2019

Nanoscale, 2019,11, 5325-5329
Article type
Paper

Growth of CdS nanotubes and their strong optical microcavity effects

L. Zhang, Y. Zhang, Y. Guo, Y. Wang, R. Liu, B. Chen, H. Zhong and B. Zou, Nanoscale, 2019, 11, 5325 DOI: 10.1039/C8NR10323B

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